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USB: serial: safe_serial: fix information leak in completion handler
author
Johan Hovold
<johan@kernel.org>
Mon, 6 Mar 2017 16:36:41 +0000
(17:36 +0100)
committer
Ben Hutchings
<ben@decadent.org.uk>
Tue, 18 Jul 2017 17:38:31 +0000
(18:38 +0100)
commit
8c76d7cd520ebffc1ea9ea0850d87a224a50c7f2
upstream.
Add missing sanity check to the bulk-in completion handler to avoid an
integer underflow that could be triggered by a malicious device.
This avoids leaking up to 56 bytes from after the URB transfer buffer to
user space.
Fixes:
1da177e4c3f4
("Linux-2.6.12-rc2")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
drivers/usb/serial/safe_serial.c
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diff --cc
drivers/usb/serial/safe_serial.c
Simple merge